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Caterpillar LR15

Maintenance schedule, common problems & OEM parts breakdown

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The Caterpillar LR15 is a landscape rake, a hydraulically driven work tool built for mounting on a skid-steer loader, not a self-propelled machine. It carries no engine, transmission, ECM, fuel tank, or cooling system of its own. Power comes entirely from the host skid steer's auxiliary hydraulic circuit, which drives an onboard hydraulic gerotor motor. That motor turns a chain-and-sprocket reduction that runs the conveyor-type rake mechanism, moving the tines through material. The LR15 mounts via Cat's standard SSL universal quick-coupler and measures 1524 mm (60 in) of working width. It sits at the narrower end of Cat's landscape rake line: the LR18 shares the same parts book but is a wider tool with its own prefix, a separate product rather than a variant of the LR15. Caterpillar later replaced this design with the LR15B, a successor generation built under its own later serial book.

On the used and parts market, the LR15's value tracks its mechanical simplicity: no engine or ECM to diagnose, just a chain drive, sprockets, tines, and a hydraulic motor. Durability holds up well when chain tension and lubrication are kept current; most failures trace to neglect rather than design. Chain stretch and hooked sprocket teeth from grit ingestion are the most common wear items. Bent or broken tines usually result from curling the rake with teeth still in the ground or striking hidden rock. Hydraulic leaks tend to show up at the quick-coupler faces, hose fittings, or the drive motor's shaft seal, often linked to a plugged or kinked case-drain line. Buyers should check chain and sprocket condition, tine wear, motor seal integrity, and run a load test before purchase.

Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.

Caterpillar LR15 specifications

Dimensions

Working width1524 mm (60 in)

Performance

Power sourceNo onboard engine, pump, or power source. Driven entirely off the host skid steer loader's auxiliary hydraulic circuit through an onboard hydraulic motor.
Hydraulic requirementRequires auxiliary hydraulic lines fitted on the host SSL. Specific flow and pressure figures are not published for this original-generation book; check the host carrier's auxiliary circuit rating before mounting.
Drive mechanismChain-driven, conveyor-type rake mechanism powered by the host machine's hydraulics.

Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.

LR15 fluids & capacities

SystemCapacityRecommended fluid
Grease points (drive chain and rake shaft/bearing pivots)Not published as a fill volume. Lubrication is by grease-gun application at each zerk fitting until grease purges at the joint, not a metered reservoir capacity. No separate hydraulic reservoir belongs to the attachment itself -- the auxiliary hydraulic circuit runs off the host skid-steer loader's own reservoir and oil.Cat multipurpose-type grease (NLGI grade selected for ambient temperature) at the chain and pivot/bearing grease fittings. No engine crankcase, cooling system, fuel tank, transmission, final drive, or axle fluids apply -- this work tool carries no engine, ECM, or gearbox of its own; a hydraulic gerotor motor mounted on the tool drives the chain rake mechanism using hydraulic flow supplied entirely by the carrier skid-steer's auxiliary circuit. Exact grease interval and any dedicated seal-kit oil for the tool's own motor/cylinders are not confirmed for this serial range from available sources -- verify against the dealer-issued OMM for S/N ADF1-UP.

Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.

Caterpillar LR15 maintenance schedule

Service intervalTasks
—
  • Inspect tines and sprocket teeth for bends, hooks, or breakage before use.
  • Check drive chain tension and lubricate if dry or dusty.
  • Inspect hydraulic hoses, quick-coupler faces, and fittings for leaks before connecting to the host.
  • Confirm the quick-coupler wedge-lock is fully engaged on the host skid steer.
  • Clear packed debris from the chain and sprocket area after use.
Every 50 h
  • Lubricate the drive chain and rake shaft/bearing pivots with Cat multipurpose grease.
  • Check chain tension and adjust as needed.
  • Inspect sprocket teeth for wear or hooking.
  • Inspect the hydraulic motor shaft seal for leakage.
  • Check the case-drain line for kinks or plugging.
Every 250 h
  • Grease all rake shaft and bearing pivot points thoroughly.
  • Inspect the chain for stretch and replace if worn beyond service limits.
  • Inspect tines for bending, cracking, or wear; replace as needed.
  • Check hydraulic motor performance under load for slow or weak operation, a sign of internal gerotor wear.
  • Inspect the quick-coupler wedge-lock mechanism for wear.
Every 500 h
  • Perform a full chain and sprocket wear inspection; replace worn components as a set.
  • Inspect the hydraulic motor seal and case-drain routing thoroughly.
  • Check all grease points and bearing pivots for play or wear.
  • Load-test the rake under host hydraulic flow to verify motor condition.
  • Inspect the frame and mount points for cracks or wear from field use.

Servicing the LR15 beyond the schedule

Predictive maintenance & fluid analysis

The LR15 carries no engine or hydraulic reservoir of its own, so predictive care centers on chain and motor condition rather than fluid sampling. Track chain tension trends between service intervals; accelerating stretch signals sprocket wear or grit ingestion. Watch for a motor that runs slow or weak under good host flow, an early sign of internal gerotor wear. Check grease condition at chain and pivot points for contamination. Report any change in host aux-circuit flow performance promptly, since the rake has no ECM to flag it.

Corrective & common repairs

Most corrective work on the LR15 centers on the chain, sprockets, and tines. Replace hooked or worn sprocket teeth before they accelerate chain wear. Straighten or replace bent tines caused by curling the rake with teeth still grounded or striking buried rock. Reseat or reseal a leaking quick-coupler face or hose fitting promptly to keep contamination out of the drive. A leaking motor shaft seal often traces to a plugged or kinked case-drain line; clear the line before replacing the seal. Adjust chain tension whenever slack develops.

Overhaul & rebuild points

When rebuilding an LR15, inspect the full chain and sprocket set together rather than replacing pieces piecemeal; mismatched wear shortens the life of new components. Check rake shaft and bearing pivots for play and regrease or replace as needed. Test the hydraulic motor under host load to confirm the gerotor element still delivers full torque and speed. Inspect the quick-coupler wedge-lock faces for wear that could loosen the mount. Verify hose routing and the case-drain path are clear before returning the tool to service.

Seasonal & environment servicing

Grit and abrasive soil accelerate chain and sprocket wear, so shorten lubrication intervals when working sandy or rocky ground. Cold-weather storage calls for greasing all pivot points before layup to keep bearings from drying out. In wet or muddy conditions, check the quick-coupler and hose fittings more often for washed-out grease or trapped debris. Before seasonal storage, run a load test on the hydraulic motor and inspect tines and chain once more so the tool is ready at next use.

LR15 attachments & work tools

Host machine size class

LR15 is built as a rear-mounted, hydraulically driven rake for compact-loader-class carriers, primarily skid-steer loaders. It sits at the narrower, lighter end of Cat's landscape-rake lineup, sized for smaller-frame skid-steer chassis rather than full-size wheel loaders. No engine or onboard power source; it runs entirely off the host machine's hydraulics.

Mounting / coupler system

Mounts to the host machine using Cat's standard skid-steer universal quick-coupler plate, an opposing-edge wedge-lock design that clamps the tool to the loader's lift arms for fast tool changes. This is the same coupler style used across Cat's compact-loader work-tool line; no separate or optional coupler variant is documented specifically for the LR15.

Hydraulic / auxiliary-line requirements

Needs a single continuous-flow auxiliary hydraulic circuit from the host machine to drive the rake head and conveyor; reversing the aux flow direction trips a check-valve circuit that dumps the hopper instead of running the rake motor. An exact flow and pressure figure is not separately published for the base LR15 (only for the later LR15B generation), so treat published flow/pressure numbers for that model as indicative only and confirm the correct standard-flow aux circuit setting with a dealer for this serial range.

Width / model-line configuration

LR15 is the narrower model in a two-width landscape-rake lineup, at roughly 1524 mm (60 in), against the wider companion LR18 at about 1829 mm (72 in). No additional tine-spacing or guarding options are documented specifically for the LR15 beyond its single standard configuration; width is a model-line distinction (LR15 vs LR18), not a selectable option within one model.

All LR15 assemblies by section

Every catalogued assembly group for the Caterpillar LR15. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Frame And Body
159-5348 Frame Gp-Landscape Rake
15***48Frame Group-Landscape Rake1
15***57Conveyor Group-Landscape Rake1
15***87Bucket As-Landscape Rake1
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159-5386 Frame Gp-Landscape Rake
15***58Conveyor Group-Landscape Rake1
15***86Frame Group-Landscape Rake1
15***88Bucket As-Landscape Rake1
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159-5374 Guard Gp-Sprocket
15***26Screw; (M8x1.25x20-mm)4
15***74Guard Group-Sprocket1
15***75Cover1
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Hydraulic System
159-5396 Cylinder Gp-Hydraulic
15***96Cylinder Group-Hydraulic1
15***98Kit-Seal1
25***29Rod1
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159-5376 Lines Gp-Hydraulic
14***15Connector As4
15***94Coupler As-Quick Disconnect; (Female)(Quick Disconnect)1
15***95Fitting As; (Quick Disconnect, Male)1
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159-5353 Manifold Gp-Control
15***53Manifold Group-Control1
15***81Manifold Group-Control1
2M***80Seal--To Connector Pump Outlet4
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159-5381 Manifold Gp-Control
15***81Manifold Group-Control1
15***82Plug-Orifice1
15***83Plug As1
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159-5351 Motor Gp-Gerotor
03***53Bolt; (3/8-24x6.5in)4
09***38Plug1
15***51Motor Group-Gerotor1
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159-5399 Mounting Gp-Cylinder
15***20Washer; (17x56x5-mm Thk)1
15***13Pin1
15***63Spring1
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Service Equipment And Supplies
176-2619 Kit-Roading Film -Roading
17***19Kit-Roading Film; -Roading1
17***14Film-Stripe; (Reflective, Red, White)2
17***15Film; (Reflective)(Warning)2
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159-5405 Plate & Film Gp
15***05Plate & Film Group1
15***36Film-Warning; (Read Operation Manual)1
15***38Film-Warning; (Crush Hazard, Stay Back)2
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159-5394 Plate & Film Gp
15***94Plate & Film Group1
15***36Film-Warning; (Read Operation Manual)1
15***38Film-Warning; (Crush Hazard, Stay Back)2
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Work Tool Arrangement
159-5385 Landscape Rake Ar
15***48Frame Group-Landscape Rake1
15***50Drive Group-Landscape Rake1
15***74Guard Group-Sprocket1
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159-5349 Landscape Rake Ar
15***49Landscape Rake Ar1
15***50Drive Group-Landscape Rake1
15***74Guard Group-Sprocket1
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Work Tools
159-5357 Conveyor Gp-Landscape Rake
15***54Link As3
15***57Conveyor Group-Landscape Rake1
15***60Tube As6
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159-5358 Conveyor Gp-Landscape Rake
15***54Link As3
15***58Conveyor Group-Landscape Rake1
15***65Chain As1
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159-5350 Drive Gp-Landscape Rake
01***80Setscrew-Hex Socket4
11***54Shim; (1-mm Thk)(Round)1
13***93Key1
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LR15 serial number reference

The PIN/serial plate is mounted on the rake's main frame, generally near the quick-coupler/mounting plate at the rear of the attachment since this work tool has no engine bay or cab to carry it. Read it as a 3-letter model prefix followed by a sequential unit number (for example ADF00001); the letters identify the specific model/configuration in the parts book and the number is the build sequence, not a date code.

PrefixIdentifies
ADF1-UPLR15 landscape rake, 1.52 m (60 in) width, skid-steer work tool

Frequently asked questions

What powers the Caterpillar LR15?

The LR15 has no engine of its own. It runs entirely off the host skid steer loader's auxiliary hydraulic circuit, which drives an onboard hydraulic gerotor motor that turns the chain-driven rake mechanism.

How wide is the LR15?

The LR15 has a working width of 1524 mm (60 in). It is narrower than the LR18, a related tool that shares the same parts book but is a separate, wider product.

What replaced the LR15?

Caterpillar succeeded the LR15 with the LR15B, a later generation built under its own separate serial-number book. Specific numeric specs published for the LR15B are not the same as the original LR15's.

What LR15 owners discuss

What wears out first on the LR15's drive chain, and how do owners keep on top of it?
The LR15 runs its rake/conveyor action off a gerotor hydraulic motor through a chain reduction drive. On this class of chain-driven rake, the wear point flagged most is chain stretch and hooked sprocket teeth -- dirt and grit packed into the chain case acts like grinding paste. Owners of similar attachments check chain tension on a set interval under heavy use and change the chain case oil rather than wait for symptoms. Hooked or thinned sprocket teeth mean replace chain and sprockets together; new chain run on worn sprockets wears out fast. Dedicated LR15 forum threads are thin online -- this reflects general practice for gerotor-driven, chain-reduction rake attachments. Have your dealer confirm the chain case oil type and tension spec for your unit.
Do the LR15's rake teeth bend or break, and what causes it?
Bent or broken tines are the most common wear complaint across landscape rake attachments in this class. Cited causes: backing up or curling the rake with teeth still in the ground (the single most repeated mistake in owner discussions), hitting buried rock at speed, and working ground rockier than the tool is rated for. The teeth are hardened carbon steel for durability, but any tooth can bend or snap on a hidden obstacle -- that holds for every brand in this category, not a defect specific to the LR15. A bent tine can often be straightened with a pry bar and heat if it isn't cracked; a cracked or badly deformed tine should be replaced rather than reworked.
Where do hydraulic leaks tend to show up on this type of rake?
Owners of chain/hydraulic-driven rake attachments most often flag three leak points: the quick-coupler faces at the host-machine hookup, the hose fittings running to the drive motor, and the motor's own shaft seal. Coupler leaks are usually a worn o-ring or flat-face coupler, fixed by replacing the seal or coupler half -- not a tool defect. A leaking motor shaft seal on a chain/gerotor drive often traces back to a plugged or kinked case-drain line building pressure behind the seal until it fails; that's a known failure mode for this motor type generally, not something unique to Cat's rake line. Specific LR15 leak complaints aren't well documented publicly -- the above reflects behavior typical of gerotor-motor-driven rake attachments as a category. Have your dealer check case-drain routing if shaft-seal leaks keep coming back.
What points to a failing drive motor rather than a chain problem?
A worn gerotor motor lets oil bypass the gear set instead of turning the shaft, so the classic sign is a rake running slow or weak under load even though the host skid steer's auxiliary hydraulics test out fine, plus oil showing at the case drain or shaft seal. The chain sprocket mounted right on the motor shaft puts a side load on the motor that's a common cause of front-bearing wear on chain-driven hydraulic motors generally, which then opens internal clearances and drops output. If tightening the chain and confirming the host machine's flow and pressure doesn't fix it, the motor itself is the likely cause. Have your dealer flow-test the motor before replacing it.
What hydraulic flow and pressure does the LR15 need from the host machine, and does a mismatch cause problems?
Exact flow and pressure figures for the original LR15 aren't published; the tool is designed to run on a standard-flow skid steer auxiliary circuit rather than a high-flow setup. Too little flow starves the drive and slows the chain and tine action. Too much flow on a high-flow host set wide open accelerates chain, sprocket, and motor wear. Most operators dial a high-flow-equipped loader back to standard flow for this class of rake. Confirm the exact auxiliary circuit setting with your dealer for this serial range.
What should I check before buying a used LR15?
Confirm the serial plate is present and matches the paperwork. Then run the same checklist used for any hydraulic attachment: chain tension and visible stretch or hooked sprocket teeth in the chain case, tines for cracks, heavy bending, or mismatched replacements (a sign of past hard impacts), the drive motor for leaks at the shaft seal and case-drain fitting, and every hose and coupler face for cracking, sweating, or worn seals. Ask to run it under load on a host machine through a full gather-and-dump cycle. A rake that only spins loosely with the host's auxiliary flow confirmed good points to internal motor wear. Have your dealer confirm the serial prefix and generation before you commit -- Cat's landscape-rake documentation spans more than one generation under similar model numbers.
Is there much owner discussion of the LR15 by name, and what's its general reputation?
Dedicated threads naming the Cat LR15 by model number are scarce online; most public discussion of this rake family centers on the generation currently sold rather than this exact tool. Within the broader category of hydraulically-driven, chain-drive landscape rakes for skid steers, the type is generally seen as a durable, low-drama attachment when matched to the right flow and kept out of ground it isn't rated for. Most complaints trace back to chain and sprocket neglect, tine damage from rocky ground, or a coupler and seal leak rather than a structural or design flaw. Treat any number quoted for the LR15 alone as a same-family estimate unless your dealer confirms it against your unit's serial prefix.

Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.

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